Sign holder



FIG. 1 is a perspective view of a sign holder showing my new design;

FIG. 2 is a top plan view of FIG. 1;

FIG. 3 is a front elevational view of FIG. 1;

FIG. 4 is a side elevational view of the right side of FIG. 1;

FIG. 5 is a side elevational view of the left side of FIG. 1;

FIG. 6 is a rear elevational view of FIG. 1; and,

FIG. 7 is a bottom plan view of FIG. 1. 

The ornamental design for a sign holder, as shown and described. 